package com.xiaoyi.common.security;

import com.alibaba.fastjson.JSON;
import com.xiaoyi.entity.ResultBody;
import org.springframework.security.authentication.BadCredentialsException;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.authentication.AuthenticationFailureHandler;
import org.springframework.stereotype.Component;

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.nio.charset.StandardCharsets;

/**
 * @author 小易
 * @version 1.0
 * @description TODO 登录失败处理器
 * @date 2022/12/6 15:23
 */
@Component
public class LoginFailureHandler implements AuthenticationFailureHandler {

    @Override
    public void onAuthenticationFailure(HttpServletRequest request, HttpServletResponse response, AuthenticationException exception) throws IOException, ServletException {
        response.setContentType("application/json;charset=UTF-8");
        ServletOutputStream outputStream = response.getOutputStream();

        String msg = exception.getMessage();
        if (exception instanceof BadCredentialsException){
            msg = "用户名或密码错误！";
        }

        outputStream.write(JSON.toJSONString(ResultBody.error(msg)).getBytes(StandardCharsets.UTF_8));
        outputStream.flush();
        outputStream.close();

    }
}
